Manufacturer Code Charts: 1306

Navigation System DTC Troubleshooting: 1306

DTC 1306:

Vehicle Speed Pulse

NOTE:

- Check the vehicle battery condition first Battery Test.
- This navigation DTC sets when there is a problem with the VSP circuit.
- Check for aftermarket accessories that may interfere with the navigation system.
- Check the GPS reception in an open area.
- Aftermarket metallic window tint or electronic devices located near the audio-navigation unit or GPS antenna can potentially interfere with the operation of the navigation system.
- Check any official Honda service website for more service information about the navigation system.
- Check the connectors for poor connections or loose terminals.
- Before you troubleshoot, make sure to follow the general troubleshooting information Reading and Clearing Diagnostic Trouble Codes.

1. Clear the hard error code.

2. Test-drive the vehicle at steady speed more than 12 mph (20 km/h) for about 1 minute.

3. Check for the hard error code.

Is DTC 1306 indicated?

YES -

The failure is duplicated, go to step 4.

NO -

Intermittent failure, the system is OK at this time.

4. Go into the System Diagnostic Mode, and select the Car Status in the System Links to check the vehicle speed pulse.

5. Drive the vehicle, and watch the VSP signal.

Does the VSP signal change from [0] when stopped to [1] when the vehicle is moving?

YES -

Replace the audio-navigation unit Audio-Navigation Unit Removal/Installation (With Navigation).

NO -

Go to step 6.

6. Raise the vehicle on a lift.

7. Turn the ignition switch to LOCK (0).

8. Disconnect audio-navigation unit connector A (24P).

9. Turn the ignition switch to LOCK (II).

10. Measure the voltage between audio-navigation unit connector A (24P) terminal No. 15 and body ground while an assistant rotates the front wheel.





Does the voltage pulse between 0 V and 5 V (for example 0-5-0-5 V) as you rotate the wheels?

YES -

Replace the audio-navigation unit Audio-Navigation Unit Removal/Installation (With Navigation).

NO -

Go to step 11.

11. Turn the ignition switch to LOCK (0).

12. Jump the SCS line with the HDS.

13. Disconnect ECM/PCM connector A (49P).

14. Check for continuity between audio-navigation unit connector A (24P) terminal No. 15 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the audio-navigation unit and the ECM/PCM.

NO -

Go to step 15.

15. Check for continuity between audio-navigation unit connector A (24P) terminal No. 15 and ECM/PCM connector A (49P) terminal No. 30.





Is there continuity?

YES -

Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/ PCM Service and Repair, and recheck.

NO -

Repair an open in the wire between the audio-navigation unit and the ECM/PCM.